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Chemokines (from Ancient Greek χῠμείᾱ (khumeíā) 'alchemy' and κῑ́νησῐς (kī́nēsis) 'movement'), or chemotactic cytokines, are a family of small cytokines or signaling proteins secreted by cells that induce directional movement of leukocytes, as well as other cell types, including endothelial and epithelial cells.
Chemokine receptors are G protein-coupled receptors containing 7 transmembrane helices [5] that are found predominantly on the surface of leukocytes.Approximately 19 different chemokine receptors have been characterized to date, which share many common structural features.
The JAK-STAT signaling pathway is a chain of interactions between proteins in a cell, and is involved in processes such as immunity, cell division, cell death, and tumor formation. The pathway communicates information from chemical signals outside of a cell to the cell nucleus , resulting in the activation of genes through the process of ...
Cytokine receptors are receptors that bind to cytokines. [ 1 ] In recent years, the cytokine receptors have come to demand the attention of more investigators than cytokines themselves, partly because of their remarkable characteristics, and partly because a deficiency of cytokine receptors has now been directly linked to certain debilitating ...
Suppressor of cytokine signaling 3 (SOCS3 or SOCS-3) is a protein that in humans is encoded by the SOCS3 gene. [5] [6] This gene encodes a member of the STAT-induced STAT inhibitor (SSI), also known as suppressor of cytokine signaling , family. SSI family members are cytokine-inducible negative regulators of cytokine signaling.
All SOCS have certain structures in common. This includes a varying N-terminal domain involved in protein-protein interactions, a central SH2 domain, which can bind to molecules that have been phosphorylated by tyrosine kinases, and a SOCS box located at the C-terminal that enables recruitment of E3 ligases and ubiquitin signaling molecules.
A cytokinin signaling and response regulator protein is a plant protein that is involved in a two step cytokinin signaling and response regulation pathway. The current model of cytokinin signaling and response regulation shows that it works as a multi-step phosphorelay two-component signaling system . [ 1 ]
Pro-inflammatory cytokine IL-12 is produced in heterodimer form by B cells and antigen-presenting cells.Binding of IL-12 to IL-12R, which is composed of two different subunits (IL12Rβ1 and IL12Rβ2), leads to the interaction of IL12Rβ1 and IL12Rβ2 with JAK2 and TYK2, which is followed by phosphorylation of STAT4 tyrosine 693.